Granted Patent
Utility
US 4,366,254 · App. 06/259,560
High toughness ceramic cutting tool
Inventors:
Dennis J. Rich, Frederick C. Holtz, Jr.
Patented Case
View Patent ↗
Granted: Dec 28, 1982
Filed: May 1, 1981
Inventors
Dennis J. Rich
Frederick C. Holtz, Jr.
Assignee (at issue)
The Valeron Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.